<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>

    <style>
  html{
      perspective: 800px;
  }
        img{
            width: 200px;
            height: 200px;
            margin: 0 auto;
            transition: all 2s;
        }

        img:hover{
            transform: rotateY(180deg);
            /*设置元素的背面是否显示
              visible 显示
              hidden 影藏
            */
            backface-visibility:visible;
        }
    </style>
</head>
<body>
   <img src="../img/fenche.png" alt="风车">
</body>
</html>